If it is cracked yes you will.The fix is either a used cyl hd or a new one.I take it this is a 2.0L SOHC eng.If the car is lower mileage and has been well kept then it is worth repairing.Of course if you are going to repair it,I recommend changing the water pump,belt,and belt tensioner also since you are already in there.Gaskets and head bolts of course.Figure there is always a hose or other part needing change too.The heads should be the same for the 2.0L SOHC certainly 96-99 are.Hard to do? Not really but I guess that depends on your experience.If it is super hi mileage just change the engine.Hopefully you can buy it cheap.